JPH0715822U - Permeable block - Google Patents

Abstract

(57) [Abstract] [Purpose] To maintain the stable collection and drainage action over a long period of time, as it is easy and inexpensive to manufacture using discarded plastic, is lightweight, is easy to transport and construct. It provides a water-permeable block that can [Structure] A gap 12 for water passage is formed between each plastic piece 10 of a block body 11 in which a plastic piece 10 is molded in a block shape, and a hollow shape is formed inside the block body 11 along its longitudinal direction. A water channel 13 is formed, which is buried in the ground to form an underdrain 1. Water that has exuded from the ground is infiltrated through a water passage gap 12 and drained through an inner water channel 13. It is something that is done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water-permeable block formed by molding plastic pieces into blocks.

[0002]

[Prior art]

 Generally, when a field such as a field, a field, a meadow, a golf course, an orchard, or a playground is constructed by breaking mountains, the ground of the constructed land is soft, so that when heavy rain falls, the buoyancy causes the soil to float and is washed away by water pressure. Landslides may occur. In addition, the land that has been created has little effect of water retention due to grass and trees, so if heavy rainfall occurs, it may flow rapidly over the ground surface and temporarily flow downstream, resulting in what is called flash floods. Moreover, in orchards and golf courses with poor drainage, it often causes root rot of crops and turf. In order to prevent the occurrence of disasters such as landslides and flash floods and root vegetation in such land, it is common to install a culvert in the ground to allow rainwater to soak into the ground and collect it through the ground. Draining is done.

Conventionally, as a method for constructing such an underdrain 1, as shown in FIG. 9, for example, a coarse stalk 3 obtained by gathering twigs 2 and bundling them to a length of about 2 m is used as a filter material and is dug on the ground 4. In addition, a hard plastic pipe 6 having a hole was passed through the groove 5 and a coarse barrel 3 serving as a filter material was placed thereon, and then soil was covered there to construct a culvert 1 in the ground.

However, in the case of using the rough bar 3 as the filter material in this way, the outer shape is not uniform due to the way the twigs 2 are bundled and the shape is not constant, so that the workability is poor and the ground surface sinks for a long time to form a dent. There are problems such as occurrence. In addition, since the spruce 3 collects and bundles the twigs 2, the availability of the twigs 2 has been lacking in recent years, and the labor cost is high and the construction cost is increasing year by year.

For this reason, in recent years, instead of the rough barrel 3, as shown in FIG. 10, crushed stone 7 is embedded as a filter material to construct the underdrain 1 in many cases. However, in the structure using this crushed stone 7, the ditch 5 is easily collapsed, especially in the case of soft soil, and even if the crushed stone 7 is put in, mud cannot invade to form the underdrain 1 of a certain shape. It was necessary to create a temporary road dedicated to the dump car for the transportation of the vehicle, which had the drawback of increasing the cost.

[0006] In addition, since the ground is exposed on the slope of the mountain road formed by cutting the mountain, it is easy to collapse when it rains. Therefore, a concrete earth stopper is buried and the upper part is projected from the ground. We try to fill the weir with the flowing soil. However, the concrete earth stopper is heavy, and the transportation and construction are troublesome, and when heavy rain falls, the earth and sand that has been washed away with the rainwater flows over the earth stopper into the Tanigawa River and the erosion control effect is lost. There was also.

[0007]

[Problems to be solved by the device]

 As a result of various studies in view of the above points, the present invention is easy and inexpensive to manufacture using discarded plastic, is lightweight, is easy to transport and construct, and has a stable collection and drainage action for a long period of time. It provides a permeable block that can be maintained well.

[0008]

[Means for Solving the Problems]

 According to the present invention, a water passage gap is formed between each plastic piece of a block body in which a plastic piece is molded into a block shape, and a water passage is formed inside the block body along its longitudinal direction. It is characterized by.

[0009]

[Action]

 A plurality of the water-permeable blocks of the present invention are arranged side by side in the longitudinal direction and are connected to each other to be buried in the ground to form an underdrain, a soil retaining wall, a U-shaped groove and the like. In the water-permeable block constructed in this way, the plastic pieces are joined together with a gap for water passage between them, so they are highly water-permeable as a filter material, and the water flowing on the ground surface or in the ground is kept between the plastic pieces. It is designed to infiltrate into the interior through the gap and to drain it in the longitudinal direction through the water passage formed inside.

In addition, the structure in which the lower side of the block main body is covered with a plastic sheet prevents the muddy water in the ground oozing from the lower side of the permeable block from blocking the water passage gap. By enclosing the outer surface with a sheet, it is possible to prevent the surface from collapsing during transportation and construction, and to maintain a predetermined shape.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention when applied to a permeable block 9 for an underdrain. The permeable block 9 for an underdrain is a rectangular parallelepiped block formed by heating a plastic piece 10 while pressurizing it. The main body 11 is molded, and a water passage gap 12 is formed between the plastic pieces 10 whose contact surfaces are heat-sealed, and a hollow water passage is formed inside the block body 11 along its longitudinal direction. The path 13 is formed. When manufacturing the underwater permeable block 9, an iron pipe is put in a mold as a core metal, a plastic piece 10 is put into the mold and pressure-molded, and then the core metal is pulled out to pass water through the wall surface. It is possible to form a hollow water passage 13 having a gap.

As the plastic piece 10, if discarded plastic such as crushed used hard plastic product or heat-condensed used foam plastic product is crushed into fine particles, The resources can be reused and can be manufactured at low cost. Further, the pressure and the heating temperature at the time of molding should be such that a gap 12 for water passage is formed between the plastic pieces 10 ..., and the strength is such that it does not collapse when the underwater permeable block 9 is transported or buried. The size of the underwater permeable block 9 is, for example, 30 cm in length and width and 90 cm in length, which is convenient for transportation and construction.

As shown in FIG. 2, the rectangular parallelepiped underwater permeable block 9 molded in the factory in this way is carried to the land for construction, and a plurality of blocks are lined up in the groove 5 dug in here and connected in the longitudinal direction. The underdrain 1 is constructed by covering the soil from above. The underdrain 1 constructed in this way has a water-permeable block 9 for underdrain that is molded into a block shape with plastic pieces 10, so it has a high water permeability as a filter material, and rainwater flowing on the ground surface penetrates into the ground for water passage. The water penetrates into the interior through the gap 12 and collects water between the plastic pieces 10, and also drains in the longitudinal direction through the water passage 13 formed inside.

Further, the plastic piece 10 is lightweight and can retain good water permeability and water retention for a long period of time without decaying. Further, since the underdrain water-permeable block 9 is pressure-molded and has an appropriate strength, it is possible to prevent the depression of the ground surface for a long period of time. Further, since the underwater permeable block 9 is molded into a block of a fixed shape, even if it is buried in the soft soil trench 5, the collapse of the trench 5 does not affect the formation of the underdrain drainage channel as planned and the construction work can be performed. It is extremely easy to do and the construction cost can be reduced to about one-third that of the conventional method.

Normally, the drainage of rainwater that has fallen on the roof is drained by providing a U-shaped groove on the ground below the eaves. However, the underdrain permeable block 9 having the above structure is buried along the bottom of the eaves of the house and the underdrain 1 If used as such, the site can be effectively used.

3 to 8 show other embodiments of the present invention which are different from each other. The block body 11 shown in FIG. 3 is formed by densely molding a large plastic piece 10 on the upper side and a fine plastic piece 10 on the lower side to form a hollow water passage 13 inside the lower side and the side surface of the lower side. It is a water conduit block 9 for the underdrain, the bottom surface of which is covered with a plastic sheet 14 such as vinyl chloride. This underdrain permeable block 9 prevents the gap 12 for water passage from being blocked by muddy water oozing out from the lower part of the underdrain 1 by the covered plastic sheet 14 and also by surrounding the outer surface for transportation and construction. It is possible to prevent the surface from collapsing and maintain a predetermined shape.

In addition, FIG. 4 shows a flat block main body 11 in which a plastic piece 10 is pressure-molded, and three hollow water passages 13 are formed inside the block main body 11 in parallel along the longitudinal direction. It is the water permeable block 9. This is the result of planting a roadside tree 18 between the paved road 16 and the paved sidewalk 17, and burying the underdrain permeable block 9 in the ground below the root 19 along the planted part.

The underwater permeable block 9 is arranged along the planted part, and a water shutoff valve for opening and closing the water passage 13 on the downstream side is attached to the outlet. When the water shutoff valve of this underwater permeable block 9 is closed, rainwater or sprinkling water that has penetrated into the ground from the ground 4 stays in the water gaps 12 of the underdrain permeable block 9 to retain water. As a result, water can be absorbed from the roots 19 and the roadside trees 18 can be grown even if it does not rain for a long time. In addition, when it rains and the water is sufficiently absorbed in the ground, the root rot can be prevented by opening the water shutoff valve and draining the water in the water passage 13. Further, by burying the underdrain permeable block 9 in a soft parking lot with poor drainage, it is possible to prevent the vehicle from being stuck in the muddy state because the ground is kept dry.

Further, FIG. 5 shows a soil-blocking water-permeable block 9 in which a plastic piece 10 is pressure-molded to have a convex cross-section, and a water passage 13 is formed inside the lower portion. It was then buried in the slope of the road in the mountains. As shown in FIG. 6, the side surface of the soil-permeable water permeable block 9 has a convex portion 20 on one side and a concave portion 21 on the other side to be fitted therein, and the convex portion 20 is formed on the concave portion 21. The earth retaining wall 22 is formed by sequentially fitting and connecting in a wall shape, and both sides of this connecting portion are connected by cassel-like connecting metal fittings 23. As shown in FIG. 5, the earth retaining wall 22 has an upper portion protruding from the ground 4 as an earth stopper, and the mud flow that has flowed from the mountain side is dammed here, and only rainwater passes through the block body 11. The water flows through the water gap 12 to the lower side and the valley side, and the water flows through the water passage 13 in the lateral direction so that only the sand 24 is blocked here.

Further, FIG. 7 shows a water retaining block 9 for earth stop formed in a flat plate shape, and the upper portion thereof is used as a earth stop and protrudes from the ground 4 and is buried in the slope as in the above. Further, the earth retaining water permeable block 9 may have a structure formed in an L-shaped cross section.

FIG. 8 shows an embodiment when applied to the U-shaped groove 25. The plastic piece 10 is pressure-molded to have a U-shaped cross section with a water passage 13 having an upper opening inside. Then, the lower side surface and the bottom surface of the block body 11 are covered with the plastic sheet 14. This is to form a U-shaped groove 25 by arranging the water permeable blocks 9 ... in the groove 5 dug on the soft ground with water, and the underground water passes from the side surface of the water permeable block 9 through the water passage gap 12 to the inside water passage. It was made to seep out to 13 and drain from there through the waterway 13 to the downstream.

[0022]

[Effect of device]

 As described above, the water-permeable block according to the present invention is easy to construct, can be produced at a factory, can be manufactured at low cost, and can maintain a stable drainage and drainage function for a long period of time. The construction of drainage underdrain, U-shaped ditch, or slope retaining wall on the slope can produce a remarkable effect. In addition, the structure in which the lower part of the block body is covered with a plastic sheet prevents the muddy water that oozes out from closing the clearance for water flow, and the surface collapses during transportation and construction. Can be prevented to maintain a predetermined shape.

[Brief description of drawings]

FIG. 1 is a front view showing an underdrain water permeable block according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an underdrain formed by embedding the underwater permeable block of FIG. 1 in the ground.

FIG. 3 is a front view showing an underdrain water permeable block according to another embodiment of the present invention.

FIG. 4 is a sectional view showing an underdrain buried under a street tree according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing an earth retaining wall formed of a water permeable block according to another embodiment of the present invention.

6 is a plan view showing the earth retaining wall of FIG. 5. FIG.

FIG. 7 is a cross-sectional view showing an earth retaining wall formed of a flat plate permeable block according to another embodiment of the present invention.

FIG. 8 is a sectional view showing a U-shaped groove formed of a water permeable block according to another embodiment of the present invention.

FIG. 9 is a cross-sectional view of a underdrain using a conventional barrel.

FIG. 10 is a sectional view of an underdrain using conventional crushed stone.

[Explanation of sign]

 1 Underdrain 2 Twig 4 Ground 5 Groove 7 Crushed stone 9 Permeable block 10 Plastic piece 11 Block body 12 Water passage gap 13 Water passage 14 Plastic sheet 18 Roadside tree 20 Convex portion 21 Concavity 22 Soil retaining wall 23 Coupling 25 U-shape groove

Claims (2)

[Scope of utility model registration request] 1. A gap for water passage is formed between each plastic piece of a block main body formed by molding a plastic piece into a block shape, and a water passage is formed inside the block main body along the longitudinal direction thereof. Characteristic water permeable block. 2. The water permeable block according to claim 1, wherein the lower surface of the block body is covered with a plastic sheet.